Stephen King might disagree - that a writer must read in order to know how to write (I'd post a link to where he said that, but I'm lazy).

I'm pretty sure it's part of "On Writing". A lot of books about writing talk about how people should watch less television if they want to find more time to write, which can make sense but I assume a lot of it comes from the time before television being where a lot of the best writing happened.